In this video I review two types of fiberglass insulation in this Scottsdale home. During our home energy audit we reveal why fiberglass batts are not bad, but so easy to install wrong. Fiberglass batts are a common cause of hot rooms in the summer because a bridged batt is like having zero insulation present… That’s right, a 9” batt is like almost nothing. Read more about why that is true, here. For the definitive guide to the types of insulation, check out the Energy.gov's blog.